cisco 4928 User Manual

Data Sheet

Cisco Catalyst 4928 10 Gigabit Ethernet Switch

High-Performance Space-Constrained Branch-Office Switching with Enterprise-Grade Features

Product Overview

The Cisco® Catalyst® 4928 10 Gigabit Ethernet Switch (4928-10GE) is a wire-speed, Layer 2 to 4, 1-rack-unit (1RU)
switch designed for space-constrained LAN distribution and core applications. Based on the proven Cisco Catalyst
4500 Series hardware and software architecture, this switch offers exceptional performance, bandwidth, and
reliability for medium-density, multilayer aggregation of high-performance LAN access switches. High performance
and scalability of intelligent network services are made possible with dedicated specialized resources known as
ternary content addressable memory (TCAM). Ample TCAM resources (64,000 entries) enable high feature capacity,
providing wire-speed routing and switching performance with concurrent provisioning of services such as quality of
service (QoS) and security, helping ensure scalability for today’s network requirements with ample room for future
growth.

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The Cisco Catalyst 4928 10 Gigabit Ethernet Switch offers 28 wire-speed 1000BASE-X Small Form-Factor pluggable
(SFP) ports and 2 wire-speed 10 Gigabit Ethernet (X2 optics) ports. Exceptional reliability and serviceability are
delivered with optional internal AC or DC 1 + 1 hot-swappable power supplies and a hot-swappable fan tray with
redundant fans (Figure 1).

Figure 1. Cisco Catalyst 4928 10 Gigabit Ethernet Switch with Hot-Swappable Fan Tray and Power Supplies

Applications

The Cisco Catalyst 4928 10 Gigabit Ethernet Switch offers flexible and highly available aggregation solutions for
nonstop unified network services. Enterprise-grade features such as dynamic routing, dual hot-swappable power
supplies, and redundant field-replaceable fans enhance switch availability.

The switch is well-suited for space- and power-constrained deployments because of its compact 1RU form factor,
economical power needs, and efficient cooling. Ideally suited to support secure converged applications such as
Cisco TelePresence and Cisco Unified Communications, the switch delivers high-performance intelligent switching
with its robust feature set.

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Figure 2. Branch Office Network Design

Data Sheet

The 28-port downlink density is ideally suited for branch-office locations where a collapsed distribution core is the
most common network architecture (Figure 2). The downlink ports provide both an aggregation point for all access
switches and connectivity and policy services for traffic flows. The uplink ports connect the LAN to the external
networks, including remote data centers and branch offices. The SFP downlink ports are compatible with many
different optics types, allowing network architects to mix and match to meet specific network requirements.

Key Features and Benefits

Wire-Speed Performance in All Directions

The Cisco Catalyst 4928 10 Gigabit Ethernet Switch delivers wire-speed throughput with low latency for data­intensive applications using a 96-Gbps switching fabric with a forwarding rate of 72 million packets per second
(mpps) in hardware for Layer 2 to 4 traffic. High-performance switching is maintained regardless of the number of
route entries or Layer 3 and 4 services enabled. Hardware-based Cisco Express Forwarding routing architecture
enables increased scalability and performance. X2 10 Gigabit Ethernet optics provide 20 Gigabit Ethernet wire­speed uplinks for maximum traffic throughput.

Power-Supply Redundancy for Nonstop Operations

The Cisco Catalyst 4928 10 Gigabit Ethernet Switch provides reliability for critical applications with 1 + 1 redundant,
hot-swappable internal AC or DC power supplies. The 1 + 1 power supply design provides A-to-B failover when
power supplies are connected to different circuits. You can mix AC and DC power supplies in the same unit for
maximum deployment flexibility. The switch also has a hot-swappable fan tray with four redundant fans for additional
serviceability and availability.

Comprehensive Management

The Cisco Catalyst 4928 10 Gigabit Ethernet Switch includes a single, dedicated 10/100 console port and a single,
dedicated 10/100 management port for offline disaster recovery and remote out-of-band management. Remote in­band management is available with the Simple Network Management Protocol (SNMP), Telnet Client, Bootstrap
Protocol (BOOTP), and Trivial File Transfer Protocol (TFTP).

The management port has two operating modes designed to increase operational efficiency and availability. When
the system is in Remote Monitoring (RMON) mode, the management port operates in a disaster-recovery mode. In
this state the operator can reload new Cisco IOS® Software images from a TFTP server. During normal system

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Data Sheet

operation the management port operates as a standard out-of-band management port. Network administrators can
use standard command-line interface (CLI) commands to monitor and configure the switch without interrupting the
data flow.

The Cisco Catalyst 4928 10 Gigabit Ethernet Switch delivers a comprehensive set of management tools to provide
the visibility and control required for LAN switching. With CiscoWorks solutions and embedded CiscoWorks
CiscoView, you can configure the switch to manage devices, VLANs, traffic, and policies. These web-based
management tools offer numerous services, including software deployment and quick isolation of error conditions.

Feature Availability

Table 1 lists software configuration options, Table 2 compares models for fiber aggregation, and Table 3 lists the
features and benefits of the Cisco Catalyst 4929 10 Gigabit Ethernet Switch.

Table 1. Software Configuration Options for the Cisco Catalyst 4928 10 Gigabit Ethernet Switch

Software Image Description

IP Base Image Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes, and Enhanced IGRP

Enterprise Services
Image

(EIGRP) stub
Enhanced Layer 3 image, including Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS),

EIGRP, Border Gateway Protocol (BGP), and all IP Base image features

Table 2. Cisco Catalyst 4900 Series Switch Model Comparison for Fiber Aggregation

Feature and Description Cisco Catalyst 4928 10 Gigabit Ethernet

Switch Capacity 96 Gbps 320 Gbps
Throughput 71 mpps 250 mpps for IPv4

IPv6 Support In software In hardware
Height 1RU 2RU
Modular Half-Card Slots 0 2
Maximum Number of 10 Gigabit Ethernet

Ports
Maximum Number of Gigabit Ethernet

(Fiber) Ports
Uplink Optics Type 4 SFP

Multilayer switching IP Base and Enterprise Service options IP Base and Enterprise Service options
Shared Buffer 16 MB 16 MB
CPU 666 MHz 1.3 GHz
Synchronous Dynamic RAM (SDRAM) 256 MB 512 MB
Active VLANs 2,048 4,096
Multicast Entries 28,000 (Layer 3)

Per-VLAN Spanning Tree (PVST) and VLAN
IDs

Spanning Tree Protocol 10000 10000
Switched Virtual Interfaces (SVIs) 2,000 4,000
Security and QoS Hardware Entries 32,000 128,000
MAC Addresses 55,000 55,000
Switched Port Analyzer (SPAN) 2 ingress and 4 egress 8 ingress and 8 egress
USB Port No Yes
Compact Flash Memory Support No Yes

Switch

2 24

28 32 (Cisco TwinGig Converter Module)

2 X2 (10 Gigabit Ethernet) optics

16,000 (Layer 2)
4,096 4,096

Cisco Catalyst 4900M Switch

125 mpps for IPv6

8 X2 (10 Gigabit Ethernet) optics

56,000 for IPv4
28,000 for IPv6

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Data Sheet

Feature and Description Cisco Catalyst 4928 10 Gigabit Ethernet

Switch

System Reset Button No Yes
Minimum Software Requirement Cisco IOS Software Release 12.2(46)SG or

later

Cisco Catalyst 4900M Switch

Cisco IOS Software Release 12.2(40)XO or later

Table 3. Features and Benefits

Feature Benefit

Outstanding Scalability

16-MB shared buffer Large buffers for high-bandwidth video distribution and large file transfers
96-Gbps and 71-mpps wire-speed

performance with low latency
Wire-speed uplinks Elimination of oversubscription bottlenecks between downlinks and uplinks across the switch

Configuration Flexibility

SFP optics support Wide range of cost-effective optics types for diverse deployment options
Dual AC or DC power High availability for nonstop operation

Delay-sensitive traffic forwarding without interruption

Supported X2 Optics

Table 4 lists the Cisco Catalyst 4928 10 Gigabit Ethernet Switch X2 optics support.

Table 4. X2 Optics Support of Cisco Catalyst 4928 10 Gigabit Ethernet Switch

Type Maximum Distance over Specified Medium

Long reach (LR) 10 km on sigle-mode fiber (SMF) (G.652)
CX4 Up to 15m on IBX4 cable
LX4 300m on multimode fiber (MMF)
Short reach (SR) 26 to 300m on MMF (depends on MMF type)
Extended reach (ER) 40 km on SMF
Long reach LRM 220m on MMF

Power Supply

The Cisco Catalyst 4928 10 Gigabit Ethernet Switch offers a choice of 300-watt (W) AC or DC power supplies. The
switch can operate with one power supply present. When two power supplies are installed, the switch shares the
power load between the two supplies. Table 5 lists the specifications of the power supplies.

Table 5. AC and DC Power Supply Specifications

Specification 300 WAC 300 WDC

Input Current 4A at 100V or 2A at 240V 8A at -40 to -72 VDC
Output Current 8A at –40 to –60 VDC 8A at -40 to -72 VDC
Output Current 25A at 12 VDC 25A at 12 VDC
Weight 2.0 kg 2.0 kg
Heat Dissipation 1023 BTU/hr 1023 BTU/hr

Switch Dimensions

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Width: 17.290 in. (43.9166 cm)

●

Depth: 16.14 in. (40.9956 cm)

●

Height: 1.712 in. (4.445 cm)

●

Weight: 16.5 lb (7.48 kg) with one power supply

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